Automatic fire-alarm.



M. KOHR.

AUTOMATIC FIRE ALARM.

APPLICATION FILED HA3. 29. 1911.

1,021,609. Patented Mar;26, 1912. 2 sums-sham 1.

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AUTOMATIC FIRE ALARM.

APPLICATION FILED MAR. 29. 1911.

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SAMUEL M. KOHR, 0F MAN(3'HES'l]'llJ3,, PENNSYLVANIA.

AUTOMATIC FIRE-ALARM.

Specification of Letters Patent.

Application filed March 29, 1911.

Patented Mar. 26, 1912.

Serial No. 617,672.

To all whom it may concern:

Be it known that I, SAMUEL M. KoHR, a citizen of the United States, residing at Manchester, in the county of York and State of Pennsylvania, have invented new and useful Improvements in AutomatioFirc- Alarms, of which the following is a specification.

The present invention provides novel means for giving an alarm in the event of excessive heat arising in a dwelling, building or other like structure in the event of tire.

The invention contemplates an alarm mechanism of the audible type, means for holding said alarm mechanism in restraint under normal conditions, a tri mechanism for releasing the alarm restraining mechanism in an emergency, and means affected by abnormal temperature to release the alarm and permit operation thereof so as to give warning of abnormal conditions in the structure, dwelling, or the like equipped with the alarm mechanism.

The invention consists of the novel fea tures, details of construction and combination of parts, which hereinafter will be more particularly set forth, illustrated in the accompanying drawings, and pointed out in the appended claims.

Referring to the drawings, forming a part I of the specification, Figure 1 is a diagrammatic view of a fire alarm mechanism embodying the invention. Fig. 2 is a detail view of the detent and trip mechanisms. Fig. 3 is a detail view of the fusible connection.

Corresponding and like parts are referred to in the following description, and indicated in all the views of the drawings, by the same reference characters.

The alarm mechanism. embodies a gong hell 1 and an actuating mechanism for operating the hammer 2, said actuating mechanism being inclosed' in a case 3. A detent mechanism cooperates with the actuating mechanism and comprises a toothed wheel 4 and a lever 5, the latter engaging a toot-h of the element 4 so as to hold the operating means in restraint. A weighted lever 6 is adapted to engage the lever 5 and trip the same to release the actuating means and thereby permit operation of the alarm mechanism. A strand 7 is connected at one end to'the lever 6 and passes loosely through eyes 8 at the ends of the supports 9, said strand preferably consisting of a string and having its opposite end made secure in any manner. The supports?) preferably consist of wire, the free ends of which are bent to form the guide eyes 8 through which the strand 7 passes.

The case 3 and supports 9 are attached to a suitable base, the same constituting the alarm mechanism which may be placed in any convenient position so as to be out of the way and yet give warning in the event of fire. The strand 7 is normally under tension and holds the weighted end of the lever 6 elevated. In the event of fire the strand 7 is burned through, thereby releasing the lever 6, which trips the lever 5 and releases the actuating mechanism .and permits a sounding of the alarm. In order that every part of a dwelling or building may be protected it is proposed to extend strands 10 from the strand 7, the strand 10 consisting likewise of a string. The. strands 10 are under tension and the arrangement is such that a release in the tension of any one of the strands 10 will result in producing a slack in the strand 7 to such an extent as to admit of the lever 6 moving and tripping the lever 5 and releasing the alarm mechanism. A fusible connection may be located in the length of any one of the strands 7 or 10, said connection embodying an element 11 which fuses at a temperature less than boiling water. Members 12 and 13 are attached to the ends of the parts of the strands to be united, said members having dovetailed portions 14 to receive corresponding end portions of the fusible connection 11. In the event of abnormal heat produced by a smoldering fire and before the latter bursts forth into flame the connection 11 is fused, thereby releasing the parts of the strand or strands and admitting of the alarm mechanism giving warning of abnormal conditions so that the cause may be inquired into and serious results avoided.

From the foregoing description, taken in connection with the accompanying drawings, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention appertains, and while I have described the principle of operation of the invention, together with thedevice which I now consider to be the embodiment thereof, I desire to have it understood that the device shown'is merely illustrative, and that such changes may be made when desired as are within the scope of the claims appended hereto.

The fusible connection 11 consists preferably of a sheet metal blank which is adapted to be bent between its longitudinal edges so as to be passed between the flanges 14 of the members 12 and 13 in the assembling of the parts forming the fusible joint.

Having thus described the invention what is claimed as new, is

1. An automatic fire alarm comprising an alarm mechanism, a detent mechanism for holding the alarm mechanism in restraint under normal conditions, a trip for effecting release of the detentmechanism, a strand normally under tension and holding the trip in restraint, yieldable supports for the strand grouped about the alarm mechanism and having eyes at their free ends through which said strand passes loosely, other strands connected with the first mentioned strand and deflecting the portions thereof intermediate the supports, and fusible joints in the lengths of the strands.

2. In an automatic fire alarm and in combination with the alarm mechanism, a strand normally under tension to hold the alarm in restraint, and a fusible connection in the length of the strand embodying members having dovetail portions and a fusible connection of corresponding shape making con nection with said members.

In testimony whereof I afliX my signature in presence of two witnesses.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

